Assertion :Due to excessive use of fertilizers the available water to the plants becomes hypertonic in relation to cell sap. Reason: The water molecules as a result diffuse out of the cells due to exosmosis.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Due to excessive use of fertilizers the available water to plants become hypertonic in relation to the cell sap. As a result the $H_{2} O$ molecule diffuse out of the cell due to exosmosis.

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Assertion :Due to excessive use of fertilizers the available water to the plants becomes hypertonic in relation to cell sap. Reason: The water molecules as a result diffuse out of the cells due to exosmosis.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.Due to excessive use of fertilizers the available water to plants become hypertonic in relation to the cell sap. As a result the H2O molecule diffuse out of the cell due to exosmosis.